FYI the docs say Chapter 1 page 8 for Macs (page 7 for Win) (these are sys requirements)

Adobe® Flash® Player 9 (32-bit embedded library)

Adobe® AIR® (external library)

then on page 33

Launch Behavior: Controls how the library launches on 32- and 64-bit systems.

Embedded (32-bit systems only): By default, the library is embedded and works internally with Poser Pro. You can dock and float the Library Palette the same as other palettes in the interface.

External (32-bit systems only): Check this option if you want to run the library as an external application. You will not be able to dock and undock the library palette, but will be able to position it on a second monitor if desired.
Foreground Poser on item load (32- and 64-bit systems): Check this option to bring Poser to the foreground after a library item is loaded. With the option unchecked, focus remains in the library until you manually switch to the Poser application to continue with your scene.

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Mine is set to external with set forground poser on item load checked. I run my library on a second monitor

FYI my largest runtime is 27 gigs

Gary

"Those who lose themselves in a passion lose less than those who lose their passion"